mirror of https://gitee.com/openkylin/linux.git
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
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#ifndef TARGET_CORE_RD_H
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#define TARGET_CORE_RD_H
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#define RD_HBA_VERSION "v4.0"
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#define RD_DR_VERSION "4.0"
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#define RD_MCP_VERSION "4.0"
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/* Largest piece of memory kmalloc can allocate */
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#define RD_MAX_ALLOCATION_SIZE 65536
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/* Maximum queuedepth for the Ramdisk HBA */
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#define RD_HBA_QUEUE_DEPTH 256
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#define RD_DEVICE_QUEUE_DEPTH 32
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#define RD_MAX_DEVICE_QUEUE_DEPTH 128
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#define RD_BLOCKSIZE 512
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#define RD_MAX_SECTORS 1024
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/* Used in target_core_init_configfs() for virtual LUN 0 access */
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int __init rd_module_init(void);
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void rd_module_exit(void);
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#define RRF_EMULATE_CDB 0x01
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#define RRF_GOT_LBA 0x02
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struct rd_request {
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struct se_task rd_task;
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/* SCSI CDB from iSCSI Command PDU */
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unsigned char rd_scsi_cdb[TCM_MAX_COMMAND_SIZE];
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/* Offset from start of page */
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u32 rd_offset;
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/* Starting page in Ramdisk for request */
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u32 rd_page;
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/* Total number of pages needed for request */
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u32 rd_page_count;
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/* Scatterlist count */
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u32 rd_size;
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/* Ramdisk device */
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struct rd_dev *rd_dev;
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} ____cacheline_aligned;
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struct rd_dev_sg_table {
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u32 page_start_offset;
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u32 page_end_offset;
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u32 rd_sg_count;
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struct scatterlist *sg_table;
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} ____cacheline_aligned;
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#define RDF_HAS_PAGE_COUNT 0x01
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struct rd_dev {
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int rd_direct;
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u32 rd_flags;
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/* Unique Ramdisk Device ID in Ramdisk HBA */
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u32 rd_dev_id;
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/* Total page count for ramdisk device */
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u32 rd_page_count;
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/* Number of SG tables in sg_table_array */
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u32 sg_table_count;
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u32 rd_queue_depth;
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/* Array of rd_dev_sg_table_t containing scatterlists */
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struct rd_dev_sg_table *sg_table_array;
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/* Ramdisk HBA device is connected to */
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struct rd_host *rd_host;
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} ____cacheline_aligned;
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struct rd_host {
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u32 rd_host_dev_id_count;
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u32 rd_host_id; /* Unique Ramdisk Host ID */
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} ____cacheline_aligned;
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#endif /* TARGET_CORE_RD_H */
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